Rocket carrying secret cargo launched People watch as a West Coast Delta 4 rocket is launched with the NROL-25 payload in a spacecraft-dep...

Rocket carrying secret cargo launched

People watch as a West Coast Delta 4 rocket is launched with the NROL-25 payload in a spacecraft-deployment flight for the government agency that operates the nation's spy satellites from Vandenberg Air Force Base in Vandenberg, California April 3, 2012. (REUTERS/Gene Blevins)

People watch as a West Coast Delta 4 rocket is launched with the NROL-25 payload in a spacecraft-deployment flight for the government agency that operates the nation's spy satellites from Vandenberg Air Force Base in Vandenberg, California April 3, 2012. (REUTERS/Gene Blevins)

A West Coast Delta 4 rocket is launched with a NROL-25 payload in a spacecraft-deployment flight for the government agency that operates the nation's spy satellites from Vandenberg Air Force Base in Vandenberg, California April 3, 2012. (REUTERS/Gene Blevins)

A Delta 4 rocket is seen poised for launch at the Vandenberg Air Force Base in California April 3, 2012. The Delta IV NROL-25 is set to launch today at 4:12 p.m. PDT from Space Launch Complex 6. (REUTERS/Gene Blevins)

A West Coast Delta 4 rocket is launched with a NROL-25 payload in a spacecraft-deployment flight for the government agency that operates the nation's spy satellites from Vandenberg Air Force Base in Vandenberg, California April 3, 2012. (REUTERS/Gene Blevins)

A rocket carrying a top-secret payload blasted off Apr. 3 from the California coast. The Delta IV rocket lifted off at 4:12 p.m. from the Vandenberg Air Force Base, about 130 miles northwest of Los Angeles.

(Agencies)